Elevator



(No Model.) .3 Sheets-Sheet 1.

B. SEWALL.

ELEVATOR.

No. 275,950. Patented Apr. 17,1883.

N. PETERS, PhcKn-Lxihngnpllan Washinglon. D, C.

3 Sheets-Sheet 2. a B. SEWALL.

(No Model.)

ELEVATOR.

Inventor.

fi' Jew/fill.

N. PETERSv Phulwlflhugnphar, Wishingloll, DJ-

s sheets-sneer (No Model.)

B. SEWALL.

ELEVATOR.

N0. Z75,950,- Patented Apr. 17,1883.

Fig.6.

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I UNITED STATES PATENT EEreE.

BRADFORD SEWALL, OF FARMINGTON, MAINE.

ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 275,950, dated April 17, 1883.

Application filed February 26, 1883. (No model.)

To all whom it may concern:

Be it known that I, BRADFORD SEWALL, of Farmington, in the county of Franklin, of the State of Maine, have invented a new and uselul Improvement in Elevators; and I do hereby declare the same to be described in the following specification and represented in the accompanying drawings, of which- Figure l is a top view, Fig. 2 a side elevation, Fig. 3 a vertical and transverse section, and Fig. at a longitudinal section, of an elevator of my improved kind. Fig.5 is a horizontal section of it, taken through the truck-axles and the grooved and recessed guideways. Fig. 6 is an inner side view of one of the said guideways. Fig. 7 is a side elevation of the pawl and brake-lever to be described.

The nature of my invention is duly defined in the claims hereinafter presented.

This elevator is for the purpose of transferring persons, goods or merchandise, carriages, or various other matters from one level to another, or from one story to another ofabuilding or other structure. It is especially useful in workshops or carriage-repositories.

In the drawings, the ear or truck A of the elevator is represented as having four wheels, to a a a, and two axles, b b, therefor, and with such wheels resting on a railway, B, there being on each axle and aside of each wheel a sheave or grooved wheel, a. From each of the opposite sides of the truck a wing or guide, d, projects, each of such guides being to enter one oftwo vertical grooves, c 0, made in two uprights or guideways, O 0. Each groove, at its lower part, opens into a gateway or recess, f, in the guideway, each recess being formed to admit of the wing or guide of the truck being moved directly underneath or away from the groove, as occasion may require, there being to each recess a gate, g, which is hinged to the upright. The gate, when closed, aids in guiding the car-guide d into the groove of the upright.

Two ropes or chains, D E, are employed to effect the raising of the truck, each of such chains being properly supported at its upper end, and thence carried partly around and underneath the two grooved wheels 0 at one side of the truck. Thence the chain passes upward about one of two sheaves, h h, and thence to and is fastened to a winding-barrel, 1', arranged as represented.

The guideways O C are to extend up to or through the various floors of a building in order for the truck to be moved from one to the other of the stories of such building, as occasion may require. The floor of each story may be provided with a fixed or a movable railway for the truck or car to run upon, and each floor, except, perhaps, the lower or basement one, is to have a hoistway or opening, F, through it for the car or truck to pass through in ascending or descending, and, if desirable, such opening may be furnished with one or a pair of trap-doors.

The Windlass-barrel, dulyjournaled in proper supporters, Gr H, has upon one end of it a gear, I, to engage with a pinion, K, fastened to one side of a wheel, L, properly pivoted to the supporter or standard G, and provided with a crank, l.

Aside of the wheel L, and fulcrumed to the supporter G, is alever, M, furnished at its end with an angular tooth, m, to engage with the teeth of the gear I. This lever also has a stud or brake, 11, extending from it over the periphcry of the wheel L. On bearing the lever downward so as to force the brake it against the wheel, such may be used to check or dimin-, ish the velocity of the downward movement of the truck or car, as occasion may require, the car being maintained at any elevation by the pawl-tooth or engaging with the gear I and preventing it from revolving forward, its revolution in the opposite way being permitted by the tooth m, which, as a tooth of the wheel presses against the inclined side of it, (the said tooth 021,) will be forced upward. In this case it will be seen that the tooth m and its sustaining-lever become a pawl to the gear-wheel, the lever, when its longer arm is depressed, serving todisengage the tooth from the gear and to press the brake stud against the brake-wheel.

As the Windlass-barrel may be revolved to wind the chains upon it they will turn the sheaves of the car or truck and raise such car or truck. On pressing down the handle of the brake-lever, so as to vcause its brake to bear on the brake-wheel, the tooth on will be lifted out of engagement with the gear, so as to allow the car or truck to descend, its rate of descent tive gears, and the chains applied to such being regulated by the brake and brake-wheel. Windlass and the truck, all being substantially I claimas set forth. 1 1. The four-wheel truck, having sheaves to 3. Each grooved and recessed guideway, 5 its axles and guides to its sides, as described, provided, as described, with a gate to its rein combination with the grooved and recessed cess, in combination with the truck having vertical guideways, and with the two chains guides, and mechanism for elevating it, suband their Windlass, arranged and adapted to stantially as specified.

operate substantially as set forth. BRADFORD SEWALL. I0 -2. The combination of the brake-wheel lever Witnesses:

and the lever having the stud or brake, and J. W. BUTTERFIELD,

the pawl-tooth, with the Windlass, its opera- P. A. SAWYER. 

